Apparatus for drying glue



(Modem A. 86 E. LISTER. 1

Apparatus for Drying Glue. NQ. 228,541. Jktented June 8, 1880.

UNITED STATES PATENT QEETQE.

APPARATUS FOR DRYING GLUE SPECIFICATION forming part of Letters Patent No. 228,541, dated June 8, 1880,

Application filed March 2, 1880. (ModeL) To all whom it may concern Be it known that we, ALFRED LISTER and EDWIN LISTER, (the firm of LISTER BROTH- ERs,) both of the ci ty of Newark, in the countyot' Essex and State of New Jersey, have invented certain new and useful Improvements in Means for Drying Glue; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which fore in vogue.

In drying the glue we make use of an approximately air-tight chamber, into which the glue is run on carriages, and through which currents of air are impelled by one or more blowers, the air being heated by being directed against a group of pipes heated by steam or otherwise. The temperature of the chamber is regulated and controlledby any appropriate means, and ascertained by means of a thermometer placed within the chamber, the thermometer, as well as the glue, being accessible to the operator through openings in the chamber. The open end of the chamber we provide with a curtain, by raising or lowering of which the temperature of the chamber may be regulated.

A system of elevators, tracks, and carriages is used for elevating and lowering the glue from one floor to another, for conveyin git along the outside of the chamber, thence into and through the same, and finally out thereof, all of which we will proceed to more particularly describe.

In the accompanying drawings, in which similar letters of reference indicate like parts in each of the several figures, Figure I is a perspective view of our apparatus, and Fig. 2 is a plan view of the same, clearly indicating the nature of the invention.

In constructing our apparatus we first build the air-tight chamber A nearly the full. length of our drying-shcds-those we now have in use being about one hundred and twenty feet in length-4n which the glue is placed for drying, leaving in one of the side walls forming said chamber A the egress-aperture or doorway B and the windows 0, through which the degree of temperature and eondition'ot' the glue are readily ascertained, one end, D, being open to allow ingress for the glue-carriages E, and the other end having an opening or openings, (0, Fig. 2, for the currents of air coming from the blowers I).

Within the chamberA is the heating or drying apparatus (I, placed in front of and in close proximity to the wind passages or inlets a, through which the wind from the blowers b is forced and heated. The chamber also contains the tracks g, upon which the incoming trucks or carriages containing the glue to be dried are transported.

The doorway or egress-apertureB is closed, when the glue is in process of drying, by the door 0, and the open end D is covered, when so required, by the curtain f, Fig. 1, which is capable of being rolled up and unrolled at the pleasure of the operator, and serves to aid in regulating the temperature of the inclosed chamber A. I

To transport the glue to and from the cham her A we construct very low skeleton trucks or carriages E, which are adapted to be run on tracks 9 and g, and also adapted to receive the frames h, Fig. 1, upon which the glue is spread. The trucks we now have in operation are constructed to receive three stacks of frames. We pile about twenty deep, each truck or carriage thus carrying about sixty frames. The chamber A being filledwith trucks so arranged, an immense quantity of drying-surface is presented to the warm dry wind blowing through the chamber.

The inside or chamber tracks, 9, are connected with outside tracks, 9, by means of carriages or trucks E, which run upon sunken transverse tracks said transverse tracks being sufficiently sunk below the level of the floor of the building to allow the floor of said truck E to be upon a level with the floor of said building. The tracks 9 connect with the elevator E, Fig. 2, upon which the trucks E are raised or lowered to or from the apartments where the glue is sliced and spread upon the frames to those where it is dried.

Upon each of the several floors of our dryingshcds we have constructed the above-described drying-chamber, with its accompaniments, all connected by tracks of the same gage and by the elevator, and we thus have facilities for drying at the same time different qualities of glue and with varying degrees of heat, in longer or shorter times, as the work may seem to require, without being in any way dependent on the state of the atmosphere outside of the building.-

In operating onr invention the glue, after being spread upon the frames h in the usual manner, ispiled or stacked upon the carriages or trucks E, which are then run upon the elevator F and raised to the floor upon which the desired drying-chamber is situated. It is then run over the track g to the transverse railway, which leads to the open end D of the drying-chamber A, the truck upon which railway carriesitto the track 9, which brings itin to position in the said drying-chamber. \Vhen said chamber A is thus filled with trucks hearing glue-frames l1 in the present case about thirty'live beingrequiredall the apertures are closed and a d raft ofcol (1 dry air is sent through the chamber A to form a skin upon the sur face of the glue, which prevents the latter from melting and falling through the netting. This being accomplished, the heat is turned on, it being regulated as already stated, and the glue dried, which result will be arrived at in about two and one-half to three days, the old method of drying by the open atmosphere requiring from two to three weeks, and sometimes even six weeks.

\Vhen the glue is dry, which can easily be ascertained through thewindows c, the trucks or carriages E bearing the glue are run out over the transverse railway through the egressaperture B. The dried glue is then stripped from the frames and dumpedinto the eonveyerbox or chute in the ordinary manner, and runs elty in the application of any one of the elements.

Having thus described our invention, what we claim, and wish to have secured by Letters Patent, is-

1. In a glue-drier, the combination of a drying-chamber, a heat-radiator, a blower for impelling air against said radiator and then through said chamber, a track and carriage for trans iiorting the glue along the chamber to one end thereof, then through said chamher and out thereof, and an elevator provided with tracks, the several parts being relatively arranged to operate as described.

2. In a glue-drier, the combination of a dryil'lg-chamber, a thermometer therein, and a transparent window to observe the same, a heat-radiator, a blower l'or impellingair against said radiator and then through said chamber, a track and carriage for transporting the glue along the chamber to one end thereof, then through said chamber and out thereof, and an elevator provided with tracks, the several parts being relatively arranged to operate as described.

In testimony that we claim the foregoing we have hereunto set our hands this 24th day of February, 1880.

ALFRED LISTER. ED \VIN LISTER.

Vitnesses OLIVER DRAKE, CHARLES H. PELL. 

